Dowel



JLTURNER.

DOWE-L- APPLICATION FILED'sEPLI. 1921.

1,419,652.,v Patented June 13,1922.

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DOWEL.

Application filed September 7, 1921.

To all to ham it may concern Be it known that I, JoHNsron TURNER, asubject of the King of Great Britain and Ireland, and residing at 28Plumpers Road, Sheflield, in the county of York, Eng land, have inventedcertain new and useful Improvements in or Relating to Dowels, of whichthe following is a specification.

This invention relates to dowels, that is to say, devices adapted tobe'secured to one part and to project into engagement with a recess orsocket in another part for the purpose of retaining the two parts incorrect relation to each other. The invention is particularly useful forconnecting the parts of wooden patterns and core boxes or for connectingpatterns or parts thereof to pattern-supporting devices, such as thepattern plates of moulding machines, but is not limited to such use.

A hollow drawn dowel-pin has been proposed comprising a cylindricaldowel portion closed at its outer end and provided at its open end withfour long angular prongs. The prongs were forced into one part andmarking of the counterpart was effected by pressing the closed outerends of the dowels against the counterpart to cause small caps ontheouter ends of the dowels to make depressions in the counterpart.

The object of the present invention is to provide an improved dowel andwith this end in view the invention consists in a dowel comprising abody portion having an axial bore extending therethrough and smallprongs for temporarily securing the body portion in position andextending laterally of and beyond one end of the body portion, incombination with a headed screw or pin, the point of which is adapted toproject from the pronged end, the head of the screw or pin being adaptedto engage the opposite end of the body so as firmly to secure the body,after it has been temporarily positioned by means of the prongs.

Referring now to the accompanying drawings Figure 1 is a plan view of aform of improved dowel;

Figure 2 is a sectional view on line A-A of Figure land showing thedowel in use on a core box or the like, and

Figure 3 is a sectional elevation of a slightly modified form of theimproved dowel.

the body 1 is shown at 3.

Specifieationcf Letters Patent- Patented June 13, 1922.

Serial No. 498,882.

are shown as claws projecting slightly outwardly and beyond the end ofmember 1. ltwlll be understood that any suitable number of prongs may beemployed. A suitable form of screws; for coroperating with The screw 3preferably hasa rounded head 4: which is of the same diameter as theouter periphery of the body 1, and an unthreaded portion 5 ofsubstantially the same length and diameter as the aperture of the body1.

It will be understood that the body portion and screw may be made of anySuitable metal, preferably iron or brass.

The body portion may be made to suit any of the standard sizes of headedscrews. The form of prong or claw illustrated in Figures 1 and 2 issuitable for dowels of the smaller sizes.

A slightly modified form of prong is shown at 6 in Figure 3, in whichthe prongs are formed entirely beyond the end surface 7 of the bodyportion, so as to allow the prongs of the dowel to be forced entirelybelow the surface of the material of the core box or the like. This formof prong is especially suitable for the larger sizes of dowel.

The improved dowel is put into position as follows A recess or bore 8 ismade in the edge face of one part 10 of, for example, a core box, and ametal socket 9 is driven into recess in the usual manner. The dowel isintro duced into the recess 8. The second part or half 11 is nowpositioned in the desired relation with respect to the part 10, and thetwo parts of the box are forced towards each other by pressing orhammering. The prongs 2 are thus caused to enter the material of part 11of the box. When the part 10 of the box is removed from the part 11, thedowel, being now secured to the part 11, leaves the recess or socket 8in the part 10, and the dowel may then be secured in position by thescrew 3.

By loosely inserting the dowel in one part and then transferring it tothe co-operating part of the box in the manner above described, all riskis eliminated 0f the two ing to the fact that the prongs hold the vparts being out of correct alignment or re lation with each other whenthe dowels are brought into engagement with their respective sockets.

If desired the body portion may' be countersunk at bothendsy and thescrew-head shaped to fit the countersunk recess at the upper end of thebody.

With the present invention patterns are not mutiliated with centre bitholes and are more readily attached to a pattern-plate owdowels inposition until they are secured by the screws.

It will be understood that any suitable size or shape of body piece andscrew may be employed.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent is l. A dowel comprising a body portion hav- Iing an axial bore extending therethrough and small prongs fortemporarily securing the body portion in position and extending screw orpin engaging the opposite end of the body so as firmly to seourethe bodyafter it has been temporarily positioned by means of the prongs. V

2. A device asclaimed in claim 1, wherein the prongs are formed entirelybeyond the 7 plane of the end surface of the body portion,

whereby said prongs maybe forced entirely belowthe surface of the memberto which the dowel is applied.

In testimony whereof I have signed my name to this specification.

f JOHNSTON TURNER,

